Virtual Observatory Services

Footprint Service

Everything you would ever want to know about the deepest fields and largest surveys starts here
with their coverage on the sky. Here is just a few things you could do on these pages right now:

Search for the coverage and exact area of a specific survey by its name or a given position. Find quickly all observations that cover all your favorite objects...
Create the formal description of your own obser­vations and calculate the exact area of the over­lapping fields in seconds. You can also
visualize the sky coverage of multiple surveys from different angles and in various projections.

Spectrum Service

A unique gateway into the world of spectra that has it all: searching, plotting,
and various analysis tools accessible via simple user and programming interfaces.

Would you like to add to this collection of over a million spectra? Register and
upload your favorite spectra and make them publicly availble, so they show up among
the results from the Sloan Digital Sky Survey and other measurements.

Filter Profiles

Instrument characteristics are vital for most scientific studies. Here you will
find the most relevant and frequently used photometric passbands. This database
of filter profiles contains consistently determined properties as well as the
detailed transmission curves. Find them based on various criteria and plot them
for comparison.

Just like the Spectrum Service, this collection is also maintained by the
community, meaning you. Login and publish your filters today.